Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 311 PM EDT Tue Apr 22 2025 Valid 00Z Wed Apr 23 2025 - 00Z Fri Apr 25 2025 ...Unsettled weather begins to expand in coverage across portions of the central and eastern U.S. with a severe weather and heavy rain threat... ...Above average, warm Spring temperatures for most of the country continue this week... Unsettled weather will begin to expand in coverage across portions of the central and eastern U.S. the next few days as embedded shortwaves in southwesterly flow spur multiple rounds of showers and thunderstorms. Moist southerly flow ahead of a quasi-stationary frontal boundary draped from the Midwest southwest through the central Plains, and a dryline extending southward through the southern High Plains, will provide a broad warm sector and help to focus one region of storm development. A Slight Risk of severe weather (level 2/5) from the Storm Prediction Center (SPC) remains in effect through Tuesday evening across portions of the central Plains and southern High Plains as some isolated thunderstorms ahead of the dryline will carry the threat of large hail and damaging winds. Some locally heavy downpours and isolated instances of flash flooding will also be possible more broadly across the southern Plains into Tuesday night. The coverage and intensity of storms is expected to pick up Wednesday and especially into Thursday. For Wednesday, the SPC has noted a Slight Risk of severe thunderstorms for portions of the southern High Plains where some isolated instances of large hail and damaging winds will again be possible. Locally heavy downpours and isolated flash flooding will also be possible across the central and southern Plains. On Thursday, an increasingly moist and unstable boundary layer as well as the expectation for multiple rounds of storms into the evening hours has prompted a Slight Risk of Excessive Rainfall (level 2/4) covering much of eastern Kansas, northern Oklahoma, northwestern Arkansas, western Missouri, far southwestern Iowa, and far southeastern Nebraska for the threat of a few more scattered instances of flash flooding. Showers are also expected in moist post-frontal upslope flow along portions of the central/northern High Plains and into the Rockies on Thursday. Some snow is expected for higher mountain elevations. A second quasi-stationary frontal boundary stretching from the Carolinas west through the Tennessee Valley will help provide another focus area of showers and thunderstorms across the Southeast the next couple of days, with some locally heavy downpours and isolated flash flooding possible here as well. Elsewhere, conditions will be mostly dry through Thursday. Some light showers will be possible for areas of the interior Northeast, Great Lakes, and the interior West/northern California. The SPC has noted low humidity and gusty winds will lead to Elevated fire weather conditions (level 1/3) across the west-central Florida Peninsula as well as for portions of far west Texas, southern New Mexico, and southeastern Arizona on Wednesday. Most of the country will continue to see above average, warm Spring temperatures this week. Forecast highs Wednesday and Thursday generally range from the 60s and 70s in southern New England, the Interior/Mountain West, and the West Coast/Pacific Northwest; the 70s and 80s for the Mid-Atlantic, Midwest, and central Plains; and the 80s to low 90s across the Southeast, southern Plains, and Southwest. Areas of the Northern Tier of the country near the Canadian border will be cooler and below average, with forecast highs in the 40s and 50s for areas of Maine and the interior Northeast, the Upper Great Lakes, and portions of the northern Plains/Rockies. Putnam Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php